The meeting was called to discuss what was in the best interests of the club, Little said.

"We have all agreed that when James is eligible to return to the club on 25 August, James' focus will be entirely on the 2015 season," Little said in a statement.

"He will not be in the coaching box or have an active coaching role at training.

"In that time period between 25 August until our final game of the season, James will take the opportunity to begin planning the upcoming pre-season, list management, recruiting and preparation for 2015 away from the club.

"Due to the considerable interest in this matter, we think it is important to clarify this today so that everyone understands how the club is approaching the next couple of months and there is no room for confusion or speculation."

Club great Tim Watson has led calls in the past week for Hird to stay out of the spotlight in August and September.

Thompson, a two-time premiership coach at Geelong before becoming Hird's assistant coach, has been appointed on a one-year deal before Hird takes charge for the 2015 season.

The Bombers have a 10-7 record this season under Thompson and are strong contenders for a top-eight finish.

"As much as I would dearly love to have jumped straight back into working with the team, I am determined that whatever role I play should in no way act as a distraction from the 2014 campaign," Hird said.

Hird had said on July 23 he definitely wanted to return to the club during the 2014 season.

A Federal Court trial between Essendon and Hird against ASADA, launched after the anti-doping body issued show-cause notices to 34 current and former players, is scheduled to begin in August.

Campbell's appointment was announced on Friday.

The 34-year-old former SANFL player previously held the position of Essendon's chief operating officer.